DATA SHEET
PMC-930829
ISSUE 5
PM5312 STTX
SONET/SDH TRANSPORT TERMINATING TRANSCEIVER
1 FEATURES
• Monolithic SONET/SDH Transport Overhead Terminating Transceiver for use
in STS-1, STS-3 (STM-1), or STS-12 (STM-4) line interface applications.
• Operates in one of four modes: STS-1 bit serial mode, STS-1 byte serial
mode, STS-3/STM-1 byte serial mode, or STS-12/STM-4 byte serial mode.
• Provides independent control of the transmit and receive operating modes.
• Performs byte interleaved multiplexing of lower rate drop side SONET/SDH
data streams. STS-3 to STS-1, STM-4 to STM-1 and STS-12 to STS-3
multiplexing modes are supported.
• Processes byte serial data at 6.48 Mbyte/s, 19.44 Mbyte/s or 77.76 Mbyte/s
depending on the mode selected.
• Frames to the receive stream by monitoring the status of the upstream
pattern detector provided by available Serial to Parallel / Parallel to Serial
front end devices.
• Optionally inserts the framing bytes (A1, A2) and the STS identification bytes
(C1) into the transmit stream.
• Optionally descrambles the receive STS-1, STS-3/STM-1 or STS-12/STM-4
stream. Optionally scrambles the transmit STS-1, STS-3/STM-1 or
STS-12/STM-4 stream.
• Calculates and compares the bit interleaved parity error detection codes (B1,
B2) for the receive stream. Calculates and inserts B1 and B2 in the transmit
stream.
• Optionally inserts line far end block errors (FEBE) into the Z2 growth byte
based on received B2 errors.
• Accumulates near end errors (B1, B2) and far end errors (Z2) for
performance monitoring purposes.
• Extracts the order wire channels (E1, E2) of the receive stream and serializes
them at 64 kbit/s. Optionally inserts the order wire channels into the transmit
stream.
PROPRIETARY AND CONFIDENTIALTO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE 1